I'm going to disagree with all three. Harrison had a career high in touchdowns last season and although his yardage numbers have dropped, leaving Marv in single coverage in the red zone hasn't hurt his scoring totals. I see little reason why he won't have similar numbers to last years totals.
I am a true believer in the Chargers offense and don't think last year was a fluke. Brees will continue to shine and Gates will always be a hard target to cover. He may not reach the record breaking numbers he saw last year, but he is a certain top 3 TE.
As for Ahman, I've seen him go in the mid to late second round and that is a great value for a back of his calibur. Even if he only marginally improves last years totals, he's a great 2nd back. The Packers won't get worse on defense and Ahman will get his share of touches as always.
You want the face of bust...here he is: